I recently dyed a polyester bridesmaids dress so that I could wear it again. It started out a cream color and I dyed it gun metal gray...with the iDye Poly. Now that the dress is dry I see there are some spots on the dress that are darker than the rest. Is there anything I can do to fix this? The dress was dry cleaned before I dyed it.

How frustrating! There really isn't anything that can be done at this point, short of over-dyeing the dress. You could go a darker color or re-dye with the gun metal. Depending on just what caused the spots you might be able to reduce their visibility, especially if you go with black dye.